On 05/19/2015 02:51 PM, Nikunj A Dadhania wrote:
Alexey Kardashevskiy <a...@ozlabs.ru> writes:
On 05/07/2015 05:21 PM, Nikunj A Dadhania wrote:
Each hardware instance has a platform unique location code. The OF
device tree that describes a part of a hardware entity must include
the “ibm,loc-code” property with a value that represents the location
code for that hardware entity.
Populate ibm,loc-code.
1) PCI passthru devices need to identify with its own ibm,loc-code
available on the host. In failure cases use:
vfio_<name>:<phb-index>:<slot>.<fn>
2) Emulated devices encode as following:
qemu_<name>:<phb-index>:<slot>.<fn>
Signed-off-by: Nikunj A Dadhania <nik...@linux.vnet.ibm.com>
---
hw/ppc/spapr_pci.c | 98
+++++++++++++++++++++++++++++++++++++++++++++++-------
1 file changed, 86 insertions(+), 12 deletions(-)
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 12f1b9c..d901007 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -769,6 +769,81 @@ static uint32_t spapr_phb_get_pci_drc_index(sPAPRPHBState
*phb,
return drck->get_index(drc);
}
+static bool spapr_phb_vfio_get_devspec_value(PCIDevice *pdev, char **value)
Does it have to be a separate function?
For better readability, i would prefer it this way.
This is why I asked - I was having problems understanding the difference
between these two having 6 words names ;) Do not insist though.
+{
+ char *host;
+ char path[PATH_MAX];
+
+ host = object_property_get_str(OBJECT(pdev), "host", NULL);
+ if (!host) {
+ return false;
+ }
+
+ snprintf(path, sizeof(path), "/sys/bus/pci/devices/%s/devspec", host);
+ g_free(host);
+
+ return g_file_get_contents(path, value, NULL, NULL);
+}
+
+static char *spapr_phb_vfio_get_loc_code(sPAPRPHBState *sphb, PCIDevice *pdev)
+{
+ char path[PATH_MAX], *buf = NULL;
+
+ /* We have a vfio host bridge lets get the path. */
+ if (!spapr_phb_vfio_get_devspec_value(pdev, &buf)) {
+ return NULL;
+ }
+
+ snprintf(path, sizeof(path), "/proc/device-tree%s/ibm,loc-code", buf);
+ g_free(buf);
+
+ g_file_get_contents(path, &buf, NULL, NULL);
+ return buf;
+}
+
--
Alexey
